Welcome. I keep all my Medicare up to date and travel back to USA as needed. Of course you’ll pay USA income tax annually. Most likely SSI will not follow up but inquire. Medicare n Medicaid are not of help here. Feel free to message if anything doesn’t make sense.
I agree with you. I think some people use FB just to entertain themselves and think such remarks are funny. They wait to see how many remarks they can get.
Welcome and relax. It’s Thailand. They probably won’t ask you anything. But if they do say holiday. It won’t be an issue. You’re going to love it here.